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# -*- coding: utf-8 -*-
"""
@author:XuMing(xuming624@qq.com)
@description:
"""
import json
from itertools import islice
import requests
from fastapi import HTTPException
from loguru import logger
# Search engine related. You don't really need to change this.
BING_SEARCH_V7_ENDPOINT = "https://api.bing.microsoft.com/v7.0/search"
BING_MKT = "en-US"
GOOGLE_SEARCH_ENDPOINT = "https://customsearch.googleapis.com/customsearch/v1"
SERPER_SEARCH_ENDPOINT = "https://google.serper.dev/search"
SEARCHAPI_SEARCH_ENDPOINT = "https://www.searchapi.io/api/v1/search"
# Specify the number of references from the search engine you want to use.
# 8 is usually a good number.
REFERENCE_COUNT = 8
# Specify the default timeout for the search engine. If the search engine
# does not respond within this time, we will return an error.
DEFAULT_SEARCH_ENGINE_TIMEOUT = 5
def search_with_bing(query: str, subscription_key: str):
"""
Search with bing and return the contexts.
"""
params = {"q": query, "mkt": BING_MKT}
response = requests.get(
BING_SEARCH_V7_ENDPOINT,
headers={"Ocp-Apim-Subscription-Key": subscription_key},
params=params,
timeout=DEFAULT_SEARCH_ENGINE_TIMEOUT,
)
if not response.ok:
logger.error(f"{response.status_code} {response.text}")
raise HTTPException(response.status_code, "Search engine error.")
json_content = response.json()
try:
contexts = json_content["webPages"]["value"][:REFERENCE_COUNT]
except KeyError:
logger.error(f"Error encountered: {json_content}")
return []
return contexts
def search_with_google(query: str, subscription_key: str, cx: str):
"""
Search with google and return the contexts.
"""
params = {
"key": subscription_key,
"cx": cx,
"q": query,
"num": REFERENCE_COUNT,
}
response = requests.get(
GOOGLE_SEARCH_ENDPOINT, params=params, timeout=DEFAULT_SEARCH_ENGINE_TIMEOUT
)
if not response.ok:
logger.error(f"{response.status_code} {response.text}")
raise HTTPException(response.status_code, "Search engine error.")
json_content = response.json()
try:
contexts = json_content["items"][:REFERENCE_COUNT]
except KeyError:
logger.error(f"Error encountered: {json_content}")
return []
return contexts
def search_with_serper(query: str, subscription_key: str):
"""
Search with serper and return the contexts.
"""
payload = json.dumps({
"q": query,
"num": (
REFERENCE_COUNT
if REFERENCE_COUNT % 10 == 0
else (REFERENCE_COUNT // 10 + 1) * 10
),
})
headers = {"X-API-KEY": subscription_key, "Content-Type": "application/json"}
logger.info(
f"{payload} {headers} {subscription_key} {query} {SERPER_SEARCH_ENDPOINT}"
)
response = requests.post(
SERPER_SEARCH_ENDPOINT,
headers=headers,
data=payload,
timeout=DEFAULT_SEARCH_ENGINE_TIMEOUT,
)
if not response.ok:
logger.error(f"{response.status_code} {response.text}")
raise HTTPException(response.status_code, "Search engine error.")
json_content = response.json()
try:
# convert to the same format as bing/google
contexts = []
if json_content.get("knowledgeGraph"):
url = json_content["knowledgeGraph"].get("descriptionUrl") or json_content["knowledgeGraph"].get("website")
snippet = json_content["knowledgeGraph"].get("description")
if url and snippet:
contexts.append({
"name": json_content["knowledgeGraph"].get("title", ""),
"url": url,
"snippet": snippet
})
if json_content.get("answerBox"):
url = json_content["answerBox"].get("url")
snippet = json_content["answerBox"].get("snippet") or json_content["answerBox"].get("answer")
if url and snippet:
contexts.append({
"name": json_content["answerBox"].get("title", ""),
"url": url,
"snippet": snippet
})
contexts += [
{"name": c["title"], "url": c["link"], "snippet": c.get("snippet", "")}
for c in json_content["organic"]
]
return contexts[:REFERENCE_COUNT]
except KeyError:
logger.error(f"Error encountered: {json_content}")
return []
def search_with_searchapi(query: str, subscription_key: str):
"""
Search with SearchApi.io and return the contexts.
"""
payload = {
"q": query,
"engine": "google",
"num": (
REFERENCE_COUNT
if REFERENCE_COUNT % 10 == 0
else (REFERENCE_COUNT // 10 + 1) * 10
),
}
headers = {"Authorization": f"Bearer {subscription_key}", "Content-Type": "application/json"}
logger.info(
f"{payload} {headers} {subscription_key} {query} {SEARCHAPI_SEARCH_ENDPOINT}"
)
response = requests.get(
SEARCHAPI_SEARCH_ENDPOINT,
headers=headers,
params=payload,
timeout=30,
)
if not response.ok:
logger.error(f"{response.status_code} {response.text}")
raise HTTPException(response.status_code, "Search engine error.")
json_content = response.json()
try:
# convert to the same format as bing/google
contexts = []
if json_content.get("answer_box"):
if json_content["answer_box"].get("organic_result"):
title = json_content["answer_box"].get("organic_result").get("title", "")
url = json_content["answer_box"].get("organic_result").get("link", "")
if json_content["answer_box"].get("type") == "population_graph":
title = json_content["answer_box"].get("place", "")
url = json_content["answer_box"].get("explore_more_link", "")
title = json_content["answer_box"].get("title", "")
url = json_content["answer_box"].get("link")
snippet = json_content["answer_box"].get("answer") or json_content["answer_box"].get("snippet")
if url and snippet:
contexts.append({
"name": title,
"url": url,
"snippet": snippet
})
if json_content.get("knowledge_graph"):
if json_content["knowledge_graph"].get("source"):
url = json_content["knowledge_graph"].get("source").get("link", "")
url = json_content["knowledge_graph"].get("website", "")
snippet = json_content["knowledge_graph"].get("description")
if url and snippet:
contexts.append({
"name": json_content["knowledge_graph"].get("title", ""),
"url": url,
"snippet": snippet
})
contexts += [
{"name": c["title"], "url": c["link"], "snippet": c.get("snippet", "")}
for c in json_content["organic_results"]
]
if json_content.get("related_questions"):
for question in json_content["related_questions"]:
if question.get("source"):
url = question.get("source").get("link", "")
else:
url = ""
snippet = question.get("answer", "")
if url and snippet:
contexts.append({
"name": question.get("question", ""),
"url": url,
"snippet": snippet
})
return contexts[:REFERENCE_COUNT]
except KeyError:
logger.error(f"Error encountered: {json_content}")
return []
def search_with_duckduckgo(query: str):
"""
Search with DuckDuckGo and return the contexts.
"""
try:
from duckduckgo_search import DDGS
except ImportError:
raise ImportError("Please install duckduckgo-search to use this search engine.")
contexts = []
with DDGS() as ddgs:
ddgs_gen = ddgs.text(query, backend="lite")
for r in islice(ddgs_gen, REFERENCE_COUNT):
contexts.append({
"name": r['title'],
"url": r['href'],
"snippet": r['body']
})
return contexts
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